Dust cap for tire valves



Jul 29, 1924.

- E. V. MYERS DUST CAP FOR TIRE VALVES Fila d Aux-i1 12. 1919 INVENTOR m By Attorneys; m af igfgfi/ WITNESS: L a fie k; f

Patented July 29, 1924.

NITED STATES ATENT OFFICE.

EUGENE v. MYERS, or EAST oaANeE, NEW JERSEY, AssreNoE T0 QsoHnAnEEs soN, INCORPORATED, OF BROOKLYN, NEW YORK, A CORPORATION or NEW YORK.

DUST CAP FOB TIRE VALVES.

To all whom it may concern. I

Be it known that I, EUGENE V. MYERS, a citizen of the United States of America, residing in East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Dust Caps for Tire Valves, of which the following is a specification.

This invention relates to dust caps for pneumatic tire valves and other similar devices, and aims toprovide certain improvements therein.

The standard form of dust cap now in use comprises an elongated drawn metal shell which is contracted at its bottom and internally screw-threaded to engage the threads of the valve casing. This construction of cap demands a series of drawing operations with intermediate annealing operations, and is hence relatively expensive. The process does not lend itself readily to the formation of caps of other metals than brass or other soft metals, since when such caps are constructed of iron or steel, there is an excessive wear on the dies which neutralizes to a large extent the cheapening of the metal.

According to the present construction I provide a dust cap which can be made from brass or other sheet metal without drawing operations, or at least without any expensive drawing operations. My invention comprises a cap made in two longitudinal sections which are integrally connected at or near the top or closed end of the cap. The

, invention also includes certain other features of improvement which will be hereinafter more fully described.

Referring to the drawings which illustrate two forms of the invention,

Figure 1 is a blank which may form the starting body of the cap.

Fig. 2 is a perspective view, showing the cap? partly formed.

1g. 3 is a side elevation of the completed cap.

Fig. 4 is a cross-section of Fig. 3.

Fig. 5 is a top View of Fig. 3.

Fig. 6 is an elevation of a slightly different form of cap.

Fig. 7 is a cross-section of Fig. 6.

Fig. 8 is a longitudinal section of a partly completed blank adapted to form the cap of Fig. 6.

Fig. 9 is an end elevation of the top portion of Fig. 8.

, Fig. 10 is a plan of Fig. 8.

Fig. 11 is an end elevation of the bottom portion of Fig. 8.

Referring first to Figs. lto 5, let A indicate a suitable blank which is cut from a piece of sheet metal and which has wide flanges B B and narrow flanges C C, together with an intervening section D. During or after the cutting operation the parts are bent into semi-cylindrical form, the flanges B B being maintained in the original plane, so that they extend radially of the semi-cylindrical sections E F. Parts of these flanges are bent to form right-am gled flanges G G; The flanges C C are also maintained in the original plane, so that they constitute narrow radial flanges on the two sections E F. If desired, the portion of the metal D (Fig. 1) may be drawn to a certain extent to constitute a rounded sectlon H which forms the top of the cap. This is a very simple drawing operation and requires no annealing. The sections E and F of the cap are then folded down, and the flanges G and G folded over the corresponding flanges C and C, this holding the sections firmly together. The end of the cap may be then reduced in diameter and screw-threaded, or during the forming operation the ends of the cap may be given a smaller diameter, if preferred.

Referring to Figures 6 to 11, it will be seen that the sections J J are blanked out of a sheet of metal and stamped without any drawing operation, an integral neck K being left between the two. Large flanges I; K are left on one section and smaller flanges L L on the other section, so that when the cap is folded together, and the flanges K K turned over the flanges L L both of the over-turned flanges will be on one section. The contracting of the foot portion may be accomplished before or after the sections are folded.

It is not necessary that the flanges run the complete length of the cap, as they may be constructed of any length desired.

The present invention provides a cap of very cheap and simple construction which can be made wholly or partly by stamping or bending operations. It has the further advantage that the sections of the cap are integrally connected, and may be handled as one piece. Hence no matching of the sections or double handling is required.

Furthermore, there is at least one point of connection between the sections of the cap Which will enable the cap to retain its form even if the flanges are more or less loosely connected in the final structure. The top of the cap is also of finished form Without flanges.

While I have shown and described several forms of the invention, it will be understood that I do not Wish to be limited thereto, since various changes may be made therein Without departing from the spirit of the invention.

What I claim is A dust cap for tire valves or the like formed trom a single sheet metal blank by a series of bending operations, said cap having a closed end free from projections of any kind and a body portion having a plurality of outwardly directed longitudinally extending ribs formed by the overlapping and interengagement of the longitudinal edges of the blank, and the cap having means for connection to a tire valve or the like. I

In Witness whereof, I have hereunto signed my name.

EUGENE v. MYERS. 

